Sialoadenectomy enhances hepatic injury induced by lipopolysaccharide/galactosamine in mice
Article first published online: 13 MAR 2008
© 2008 The Authors. Journal compilation © 2008 Blackwell Munksgaard
Volume 28, Issue 6, pages 878–888, July 2008
How to Cite
Sánchez, O., Almagro, A., Viladrich, M., Ramírez, I. and Soley, M. (2008), Sialoadenectomy enhances hepatic injury induced by lipopolysaccharide/galactosamine in mice. Liver International, 28: 878–888. doi: 10.1111/j.1478-3231.2008.01713.x
- Issue published online: 4 JUN 2008
- Article first published online: 13 MAR 2008
- Received 23 October 2007Accepted 16 January 2008
- epidermal growth factor;
- perfused liver;
- tumour necrosis factor-α
Background: Submandibular salivary glands (SMGs) synthesize, accumulate and secrete a large amount of epidermal growth factor (EGF) in mice. It is known that surgical removal of SMG (sialoadenectomy) alters cell turnover in the liver and exacerbates liver injury induced by lipopolysaccharide/galactosamine (LPS/GalN).
Results: Here we show that such increased hepatotoxicity is not the consequence of the lack of EGF production from SMG. On the contrary, it appears to be the consequence of an inadequate cytokine production by the liver of sialoadenectomized mice. Thus, we found that the increase of plasma tumour necrosis factor-α and interleukin-6 was slower in sialoadenectomized than in sham-operated mice. This is because of a decreased rate of production of both cytokines by the liver. We found that the increase of plasma corticosterone (CS) concentration is lower in sialoadenectomized than that in sham-operated mice. Adrenalectomy exacerbated liver injury induced by LPS/GalN. In these animals, sialoadenectomy did not further increase the effect of LPS/GalN.
Conclusions: Our results suggest that the effect of sialoadenectomy on LPS/GalN-induced liver toxicity may be the consequence of an altered cytokine production by the liver and a reduced CS release from adrenal glands.